Misdeeds by Peter Strzok and his confederates do not implicate thousands of other FBI and Justice Department employees, but they have damaged confidence in those agencies. Former CIA Director John Brennan’s Tweet that comments by President Trump in Helsinki were “treasonous” is a timely reminder of justified concerns about Obama administration politicization of the wider intelligence community.

Mr. Brennan should be careful about casting the first stone. He voted for a Communist. As Obama’s Homeland Security Advisor, he institutionalized Muslim Brotherhood influence operations inside the U.S. government and endorsed its false claims that jihad is merely “holy struggle” and that Islam has “nothing to do” with terrorism.

John Brennan’s evident enmity towards Donald Trump today was operating when he was in government. It damaged the objectivity and reputation of the organizations he led – and discredits him as a critic of the President.